| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49488: drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected |
| |
| There is a possibility for mdp5_get_global_state to return |
| -EDEADLK when acquiring the modeset lock, but currently global_state in |
| mdp5_mixer_release doesn't check for if an error is returned. |
| |
| To avoid a NULL dereference error, let's have mdp5_mixer_release |
| check if an error is returned and propagate that error. |
| |
| Patchwork: https://patchwork.freedesktop.org/patch/485181/ |
| |
| The Linux kernel CVE team has assigned CVE-2022-49488 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 4.19.247 with commit 1a5d1474026ea4f1a6f931075ca2adb884af39cf |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.4.198 with commit 22d8424913b1348c6324916745fadaeea5273f0e |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.10.121 with commit 883f1d52a57bf51e1d7a80c432345e2c6222477e |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.15.46 with commit 09bdeedc1fc53e64b8282e1de67752c69e43bdba |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.17.14 with commit 47e393061049aff6818d1b9fdca7351411a23fc2 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.18.3 with commit 46e5ce63924a96af452c4fc5ee0bb3b241e1b9f4 |
| Issue introduced in 4.18 with commit 7907a0d77cb461f58045763c205a5830be72e97c and fixed in 5.19 with commit ca75f6f7c6f89365e40f10f641b15981b1f07c31 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49488 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c |
| drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.c |
| drivers/gpu/drm/msm/disp/mdp5/mdp5_mixer.h |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/1a5d1474026ea4f1a6f931075ca2adb884af39cf |
| https://git.kernel.org/stable/c/22d8424913b1348c6324916745fadaeea5273f0e |
| https://git.kernel.org/stable/c/883f1d52a57bf51e1d7a80c432345e2c6222477e |
| https://git.kernel.org/stable/c/09bdeedc1fc53e64b8282e1de67752c69e43bdba |
| https://git.kernel.org/stable/c/47e393061049aff6818d1b9fdca7351411a23fc2 |
| https://git.kernel.org/stable/c/46e5ce63924a96af452c4fc5ee0bb3b241e1b9f4 |
| https://git.kernel.org/stable/c/ca75f6f7c6f89365e40f10f641b15981b1f07c31 |
